Using original three-group zoom technology, Sigma has created the most compact zoom lens in its class. Less than 10cm (4 inches) long and under 7 cm (2.8 inches) diameter, with a filter diameter of just 55mm, it covers the most frequently used telephoto focal lengths, making it perfect for a broad range of subjects and applications, from portraiture to sports and nature shooting. With SLD glass to keep color aberration to a minimum, this lens stands out both in optical performance and ease of us...